Step 1

In a heavy bottomed sauce pot, whisk together milk, cream, and cornstarch. Bring to a boil. Remove from heat and add cocoa powder and espresso powder. Whisk until cocoa powder has dissolved.

Step 2

Place chopped chocolate in a large bowl. Pour hot liquid mixture over chocolate. Let sit for a couple minutes to allow the chocolate to melt. Stir to combine. Add sugar and salt. Mix until distributed. Let mixture sit for a couple minutes to allow to cool.

Step 3

Transfer to a large pitcher (or large liquid measuring cup) and pour into popsicle molds. Place in freezer for 30 minutes. Insert wooden sticks into molds and return to freezer for another 4 hours until fudge bars are solid.